The shortest song in the world is just 1.644 seconds long - Apparently.
In 1964, British musician Roger Greenawalt created the shortest song in the world, titled "I'm So Happy I Could Cry." The song was recorded on a single reel of tape and features a simple melody played on a harmonica. The song was submitted to the Guinness World Records and was officially recognized as the shortest song in the world. Despite its brevity, "I'm So Happy I Could Cry" still holds the record today.